Just another aspect of how the web shakes down sites not Gov. owned.
Many of the sites I visit get a version of this same alarm.
It’s an annual thing. Just one of those bills you have to pay annually like property taxes, insurance etc.
A Federal web site had a certificate expire about a month ago.
Strangely enough, when they fixed it, the new certificate they installed was valid 3 months prior, meaning that they could have replaced it anytime within the prior three months instead of waiting till after it expired.